Lakeshore 340, User Manual, Page: 156 / 178

Lake Shore Model 340 Temperature Controller User’s Manual
10-16 Options and Accessories
10.6.5 Computer Interface Commands
Most of the computer interface commands used by the Model 340 are independent of installed options or
sensor type. The following commands or formats change when the 3468 is installed.
1. In most command strings the <input> field accepts A, B or C1—C4, D1—D4 instead of only A and B.
2. The INTYPE command changes to the following format for 3468 inputs.
INTYPE <input>,<type>
<input>: Specifies input to configure: C or D.
<type>: Specifies input sensor type. Valid entries:
1 = Silicon Diode 4 = Platinum 100 (500
Ω
) 7 = NTC RTD
2 = GaAlAs Diode 5 = Platinum 1000
3 = Platinum 100 (250
Ω
) 6 = Rhodium Iron
Example: INTYPE C,1 – Sets sensor type to silicon diode for all C channels.
3. The INTYPE? query changes to the following format.
INTYPE? <input>
<input>: Specifies input to query: C or D.
Returned: <type>,<units>,<coefficient>,<excitation>,<range>
<type>: See the INTYPE command.
<units>: Sensor units: 1 = volts, 2 = ohms.
<coefficient>: Temperature coefficient: 1 = negative, 2 = positive.
<excitation>: Input excitation: 6 = 10
µ
A, 10 = 1mA.
<range>: Input range: 8 = 250mV 11 = 2.5V 13 = 7.5V
9 = 500mV 12 = 5V 14 = 75mV
10.6.6 Specifications
The 3468 Option Card input specifications are listed in Table 10-3.
Supported Lake Shore Sensors *
Type Model Temp. Range
Diodes
Silicon Diode DT-470 1.4 – 475 K
Silicon Diode DT-670 1.4 – 500 K
GaAIAS Diode TG-120 1.4 – 475 K
Positive Temperature Coefficient RTDs
100
Ω
Platinum PT-100, 250
Ω
Full Scale
30 – 675 K
100
Ω
Platinum PT-100, 500
Ω
Full Scale
30 – 800 K
Rhodium-Iron RF-800-4 4 – 400 K
Negative Temperature Coefficient RTDs
Germanium GR-200A-1000 2 – 100 K
Germanium GR-200A-250 1.2 – 40 K
Carbon Glass™ CGR-1-500 3 – 400 K
Cernox™ CX-1050 AA or SD 3.5 – 400 K
Cernox™ CX-1030 AA or SD 2 – 325 K
Rox™ RX-102A 3 – 200 K
Rox™ RX-202A 3 – 300 K
Thermox™ TX-104-GB 110 – 325 K
*
Sensors sold separately.